Developers have been able to try out the beta version of OS X 10.10.3, and as of Monday the public can, too. Mac users who signed up to participate in the public beta program can download the latest prerelease build of the upcoming Mac OS update, and it includes a beta version of the iPhoto replacement app Photos, too.

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Don't forget beta means "not ready to ship," so there may be bugs and other surprises that cause app crashes and data loss. If you're planning on playing with the beta consider installing in on a Mac that isn't critical for your daily work.

The just released ExoLens kit for the iPhone 6 is a professional pair of lenses, a 3x telephoto and a wide angle that attach to the iPhone with a sturdy lattice mount. The mount is threaded with a standard 1/4"-20 connection, ready for a tripod. The system is designed for growth.

Apple has issued a warning to developers that it has deprecated the garbage collection feature used for memory management in favor of Automatic Reference Counting, or ARC. New Mac apps and app updates submitted to the Mac App Store starting in May will be required to use ARC.

There's a lot of customization you can do to iTunes 12's new interface, and in today's Quick Tip, we're going to talk about changing which media shortcuts appear in the upper-left corner. Don't need an icon for movies or TV shows because you don't have any? No problem!

Someone recently asked Dr. Mac about his “must-have” applications for Mac OS X Yosemite, so he wrote a column about it. Dr. Mac's Rants & Raves Episode #110 is all about three utilities that save him time and keystrokes every day.

In today's Quick Tip, Melissa Holt's going to discuss how you can use those funny little printed function keys on your Apple keyboard to open the System Preferences pane associated with each item. This is one of the fastest ways to access your display settings or your sound preferences, say, so come check it out!

Melissa Holt is frustrated with a setting in Yosemite's Calendar program. For some people, having a certain preference turned on means that they can't double-click to add an event and then immediately start typing to fill in its details. We've got the fix (and a bit of her ranting about it) in today's Quick Tip.

If you've been thinking about trying out antivirus software on your Mac, we have a deal that will let you do it for free. It's a 6-month subscription for Bitdefender Antivirus Software for Mac, and you can get it for free through our friends at Stack Social. It works with Lion, Mountain Lion, Mavericks, and Yosemite. There's additional information on the deal's page.

Apple released Apple Remote Desktop 3.8 on Wednesday, the first update for the remote Mac administration app in more than a year. The update improved OS X Yosemite compatibility, refreshed the user interface, and more.

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Apple still supports ARD? We thought they forgot about it since its last update was pretty much just an OS X Mavericks compatibility release.

Using iPhoto to manage the photos from your iPhone, iPad, and digital camera is fine unless the thumbnails showing you previews of your snapshots disappear. Keeping track of your pics when you can't actually see them isn't very productive, but there is a fix for that. Read on to learn how to resurrect your missing iPhoto image thumbnails.